Home / 13,145.96-18,119.78-9,318.86

Finding the Fourth Proportional to 13,145.96, 18,119.78 and 9,318.86

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Solution

The fourth proportional to 13,145.96, 18,119.78 and 9,318.86 is: 12,844.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.96 : 18,119.78 = 9,318.86 : x
  2. Step 2: Convert to fraction form
    13,145.96/18,119.78 = 9,318.86/x
  3. Step 3: Cross multiply
    13,145.96x = 18,119.78 × 9,318.86
  4. Step 4: Simplify right side
    13,145.96x = 168,855,693.05
  5. Step 5: Solve for x
    x = 168,855,693.05/13,145.96
  6. Step 6: Final answer
    x = 12,844.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.